EP0179022B1 - Benzoylphenylharnstoffe - Google Patents

Benzoylphenylharnstoffe Download PDF

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Publication number
EP0179022B1
EP0179022B1 EP85810468A EP85810468A EP0179022B1 EP 0179022 B1 EP0179022 B1 EP 0179022B1 EP 85810468 A EP85810468 A EP 85810468A EP 85810468 A EP85810468 A EP 85810468A EP 0179022 B1 EP0179022 B1 EP 0179022B1
Authority
EP
European Patent Office
Prior art keywords
formula
compound
salt
fluoro
chloro
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP85810468A
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German (de)
English (en)
French (fr)
Other versions
EP0179022A2 (de
EP0179022A3 (en
Inventor
Jozef Dr. Drabek
Manfred Böger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Novartis AG
Original Assignee
Ciba Geigy AG
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Filing date
Publication date
Application filed by Ciba Geigy AG filed Critical Ciba Geigy AG
Priority to AT85810468T priority Critical patent/ATE58131T1/de
Publication of EP0179022A2 publication Critical patent/EP0179022A2/de
Publication of EP0179022A3 publication Critical patent/EP0179022A3/de
Application granted granted Critical
Publication of EP0179022B1 publication Critical patent/EP0179022B1/de
Anticipated expiration legal-status Critical
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C275/00—Derivatives of urea, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups
    • C07C275/28—Derivatives of urea, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups having nitrogen atoms of urea groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton
    • C07C275/30—Derivatives of urea, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups having nitrogen atoms of urea groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton being further substituted by halogen atoms, or by nitro or nitroso groups
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C265/00—Derivatives of isocyanic acid
    • C07C265/12—Derivatives of isocyanic acid having isocyanate groups bound to carbon atoms of six-membered aromatic rings
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N47/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid
    • A01N47/08—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having one or more single bonds to nitrogen atoms
    • A01N47/28—Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N<
    • A01N47/34—Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N< containing the groups, e.g. biuret; Thio analogues thereof; Urea-aldehyde condensation products
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C275/00—Derivatives of urea, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups
    • C07C275/28—Derivatives of urea, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups having nitrogen atoms of urea groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton
    • C07C275/32—Derivatives of urea, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups having nitrogen atoms of urea groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton being further substituted by singly-bound oxygen atoms
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C275/00—Derivatives of urea, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups
    • C07C275/46—Derivatives of urea, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups containing any of the groups, X being a hetero atom, Y being any atom, e.g. acylureas
    • C07C275/48—Y being a hydrogen or a carbon atom
    • C07C275/54—Y being a carbon atom of a six-membered aromatic ring, e.g. benzoylureas

Definitions

  • the present invention relates to new substituted N-benzoyl-N'-2,5-dichloro-4-hexafluoropropyloxyphenylureas, processes and intermediates for their preparation and their use in pest control.
  • R 1 is hydrogen, fluorine, chlorine or methoxy and R 2 is fluorine, chlorine or methoxy, and their salts.
  • R 1 is hydrogen, fluorine or chlorine and R 2 is fluorine or chlorine and also in that R 2 is hydrogen or fluorine and R 2 is fluorine or chlorine.
  • the compounds of the formula can be prepared analogously to processes known per se (see, for example, German Offenlegungsschriften Nos. 2.123.236, 2.601.780 and 3.240.975).
  • R and R 2 have the meanings given above under formula 1, and R represents a C 1 -C 8 -alkyl radical which is optionally substituted by halogen, preferably chlorine.
  • the mentioned processes a), b) and c) can preferably be carried out under normal pressure and in the presence of an organic solvent or diluent.
  • Suitable solvents or diluents are e.g. Ethers and ethereal compounds such as diethyl ether, dipropyl ether, dibutyl ether, dioxane, dimethoxyethane and tetrahydrofuran; N, N-dialkylated carboxamides; aliphatic, aromatic and halogenated hydrocarbons, in particular benzene, toluene, xylene, chloroform, methylene chloride, carbon tetrachloride and chlorobenzene; Nitriles such as acetonitrile or propionitrile; Dimethyl sulfoxide as well as ketones, e.g.
  • Process a) is generally carried out at a temperature of -10 to + 200 ° C, preferably between 0 and 100 ° C, e.g. at room temperature, optionally in the presence of an organic base, e.g. Triethylamine.
  • Process b) is carried out at a temperature of 0 to 150 ° C., preferably at the boiling point of the solvent used, and optionally in the presence of an organic base, such as pyridine, and / or with the addition of an alkali or alkaline earth metal, preferably sodium.
  • an organic base such as pyridine
  • the starting materials of the formulas III and V are known and can be prepared analogously to known processes.
  • the starting aniline of formula 11 is a novel compound which also forms an object of the present invention.
  • the compound of formula II can be prepared in a manner known per se by reacting the appropriately substituted nitrobenzene of formula VII in analogy to the process shown in J. Org. Chem. 29 (1964), 1, hydrogenated (cf. also the literature cited there).
  • the aniline of the formula II is also accessible by chemical reduction (for example by means of Sn (II) chloride / HCl) of the nitro compound of the formula VII (cf. Houben Weyl, "Methods of Organic Chemistry" 11/1, 422) .
  • the nitro compound of formula VII itself can be prepared by haloalkylating 2,5-dichloro-4-nitrophenol.
  • Another way of producing the aniline of the formula II is to haloalkylate the acylated 2,5-dichloro-4-hydroxyaniline in a corresponding manner and then remove the acyl group, for example by acid hydrolysis, or haloalkylation with a salt of 2.5 -Dichlor-4-hydroxyanilins, for example the chlorohydrate.
  • benzoyl isocyanates according to formula III can be obtained as follows (cf. J. Agr. Food Chem. 21, 348 and 993; 1973):
  • the novel 4- (hexafluoropropyloxy) phenyl isocyanate of the formula IV (bp 95 ° C / 0.1 Torr.) Can be e.g. by phosgenation of the aniline of the formula II by generally customary processes and also forms an object of the invention.
  • the benzamides of the formula V which are also to be used as starting materials are known (see, for example, Beilstein "Handbook of Organic Chemistry", vol. 9, p. 336).
  • Urethanes of the formula VI can be obtained in a manner known per se by reacting a benzoyl isocyanate of the formula III with a corresponding alcohol or by reacting a benzamide of the formula V in the presence of a basic compound with a corresponding ester of chloroformic acid CI-COOR.
  • novel compounds of the formula I also include their salts, which are not only distinguished by their high insecticidal activity, but also by their good solubility in solvents and Diluents, especially in organic solvents and are characterized by improved formability.
  • the metal salts of the compounds of the formula according to the invention should be emphasized in particular their alkali and alkaline earth metal salts, preferably the sodium salts and potassium salts. These salts are prepared in a manner known per se, e.g. by reacting a compound of formula I with a metal alkanolate, such as sodium ethylate or potassium methylate. For a given salt, desired salts of other metals can be obtained by salting.
  • salts of the compounds of formula 1 with organic bases which are essentially characterized by the presence of a quaternary nitrogen atom.
  • These salts correspond to formula la where R, and R 2 have the meanings given above and X ° is the cation of an organic base.
  • X ⁇ preferably represents the following organic cations: where n is a number 8 to 12.
  • the salts according to formula la) also include mixtures of these salts with different cations.
  • the salts of the formula la can be prepared in a manner known per se by reacting a compound of the formula I with corresponding ammonium hydroxides of the formula X e (OH) °, where X ⁇ has the meaning given above.
  • the present compounds of the formula I and their salts have excellent activity as pesticides with good plant tolerance and low toxicity to warm-blooded animals. They are particularly suitable for combating insects and plants of the Akarina species that attack plants and animals.
  • the compounds of the formula I are particularly suitable for controlling insects of the orders: Lepidoptera, Coleoptera, Homoptera, Heteroptera, Diptera, Thysanoptera, Orthoptera, Anoplura, Siphonaptera, Mallophaga, Thysanura, Isoptera, Psocoptera and Hymenoptera, and representatives of the order Akarina der Families: Ixodidae, Argasidae, Tetranychidae and Dermanyssidae.
  • Musca domestica and mosquito larvae can also use compounds of the formula I for combating plant-damaging insects in ornamental and useful plants, in particular in cotton crops (for example Spodoptera littoralis and Heliothis virescens), and in fruit and vegetable crops (for example Laspeyresia pomonella, Leptinotarsis decemnaeata ) are used.
  • the compounds of the formula are distinguished by a pronounced ovicidal and, above all, larvicidal action against insects, in particular larvae of feeding insect pests. If compounds of the formula of adult insect stages are ingested with the feed, in many cases, especially with coleopteras, such as e.g. Anthonomus grandis, a reduced egg deposit and / or a reduced hatching rate.
  • the compound of the formula can also be used to control ectoparasites such as Lucilia sericata on domestic and farm animals, e.g. through animal, stable and pasture treatment.
  • the compounds of the formula I are also suitable for combating the following mite species afflicting fruit and vegetable crops: Tetranychus urticae, Tetranychus cinnabarinus, Panonychus ulmi, Broybia rubrioculus, Panonychus citri, Eriophyes piri, Eriophyes ribis, Eriophyes vyllidesusitispyllidususyllitis, Varsidesuta phyllus, tarsenitis phyllis, varsiditis, varsiditis, v oleivora.
  • the good pesticidal activity of the compounds of the formula I according to the invention corresponds to one Mortality rate of at least 50-60% of the pests mentioned.
  • Additions are e.g. Representatives of the following classes of active substance are considered: organic phosphorus compounds, nitrophenols and derivatives, formamidines, ureas, carbamates, pyrethroids, chlorinated hydrocarbons and Bacillus thuringiensis preparations.
  • the compounds of the formula are used in unchanged form or preferably together with the auxiliaries customary in formulation technology and can therefore, for example to emulsion concentrates, directly sprayable or dilutable solutions, diluted emulsions, wettable powders, soluble powders, dusts, granules, also encapsulations in e.g. polymeric substances are processed in a known manner.
  • the application methods such as spraying, atomizing, dusting, scattering or pouring, as well as the means, are chosen in accordance with the desired goals and the given conditions.
  • the wording i.e. the agents, preparations or compositions containing the active ingredient of formula I, or combinations of these active ingredients with other insecticides or acaricides, and optionally a solid or liquid additive, are prepared in a known manner, e.g. by intimately mixing and / or grinding the active ingredients with extenders, e.g. with solvents, solid carriers, and optionally surface-active compounds (surfactants).
  • extenders e.g. with solvents, solid carriers, and optionally surface-active compounds (surfactants).
  • Possible solvents are: aromatic hydrocarbons, preferably the fractions C 8 to C 12 , such as, for example, xylene mixtures or substituted naphthalenes, phthalic acid esters, such as dibutyl or dioctyl phthalate, aliphatic hydrocarbons such as cyclohexane, paraffins, alcohols and glycols and their ethers and esters , such as ethanol, ethylene glycol, ethylene glycol monomethyl or ethyl ether, ketones, such as cyclohexanone, strongly polar solvents, such as N-methyl-2-pyrrolidone, dimethyl sulfoxide or dimethylformamide, and optionally epoxidized vegetable oils, such as epoxidized coconut oil or soybean oil, or water.
  • aromatic hydrocarbons preferably the fractions C 8 to C 12 , such as, for example, xylene mixtures or substituted naphthalenes, phthalic acid esters, such as di
  • solid carriers e.g. natural dust, such as calcite, talc, kaolin, montmorillonite or attapulgite
  • natural dust such as calcite, talc, kaolin, montmorillonite or attapulgite
  • highly disperse silicas or highly disperse absorbent polymers can also be added.
  • Porous types such as e.g. Pumice stone, broken brick, sepiolite or bentonite, as non-sorptive carrier materials e.g. Calcite or sand in question.
  • a large number of granulated materials of inorganic or organic nature such as, in particular, dolomite or comminuted plant residues, can be used.
  • Suitable surface-active compounds are nonionic, cationic and / or anionic surfactants with good emulsifying, dispersing and wetting properties. Surfactants are also to be understood as mixtures of surfactants.
  • Suitable anionic surfactants can be both so-called water-soluble soaps and water-soluble synthetic surface-active compounds.
  • Suitable soaps are the alkali, alkaline earth or optionally substituted ammonium salts of higher fatty acids (e'O-e22), e.g. the Na or K salts of oleic or stearic acid, or of natural fatty acid mixtures, e.g. can be obtained from coconut or tall oil.
  • surfactants are the fatty acid methyl taurine salts and modified and unmodified phospholipids.
  • the fatty sulfonates or sulfates are usually present as alkali, alkaline earth or optionally substituted ammonium salts and generally have an alkyl radical with 8 to 22 carbon atoms, alkyl also including the alkyl part of acyl radicals, e.g. the Na or Ca salt of lignin sulfonic acid, dodecylsulfuric acid ester or a fatty alcohol sulfate mixture made from natural fatty acids.
  • This subheading also includes the salts of sulfuric acid esters and sulfonic acids from fatty alcohol / ethylene oxide adducts.
  • the sulfonated benzimidazole derivatives preferably contain 2 sulfonic acid groups and a fatty acid residue with about 8-22 carbon atoms.
  • Alkylarylsulfonates are e.g. the sodium, calcium or triethanolamine salts of dodecylbenzenesulfonic acid, dibutylnaphthalenesulfonic acid or a naphthalenesulfonic acid-formaldehyde condensation product.
  • Corresponding phosphates such as e.g. Salts of the phosphoric acid ester of a p-nonylphenol (4-14) ethylene oxide adduct, in question.
  • Suitable nonionic surfactants are primarily polyglycol ether derivatives of aliphatic or cycloaliphatic alcohols, saturated or unsaturated fatty acids and alkylphenols, which can contain 3 to 30 glycol ether groups and 8 to 20 carbon atoms in the (aliphatic) hydrocarbon radical and 6 to 18 carbon atoms in the alkyl radical of the alkylphenols.
  • nonionic surfactants are the water-soluble 20 to 250 ethylene glycol ether groups and 10 to 100 propylene glycol ether groups containing polyethylene oxide adducts with polypropylene glycol, ethylenediaminopolypropylene glycol and alkylpolypropylene glycol with 1 to 10 carbon atoms in the alkyl chain.
  • the compounds mentioned usually contain 1 to 5 ethylene glycol units per propylene glycol unit.
  • nonionic surfactants are nonylphenol polyethoxyethanols, castor oil polyglycol ethers, polypropylene / polyethylene oxide adducts, tributylphenoxypolyethoxyethanol, polyethylene glycol and octylphenoxypolyethoxyethanol.
  • Fatty acid esters of polyoxyethylene sorbitan, such as polyoxyethylene sorbitan trioleate, are also suitable.
  • the cationic surfactants are primarily quaternary ammonium salts which contain at least one alkyl radical having 8 to 22 carbon atoms as N substituents and have lower, optionally halogenated alkyl, benzyl or low hydroxyalkyl esters as further substituents.
  • the salts are preferably in the form of halides, methyl sulfates or ethyl sulfates, e.g. the stearyl trimethyl ammonium chloride or the benzyl di (2-chloroethyl) ethyl ammonium bromide.
  • the pesticidal preparations generally contain 0.1 to 99%, in particular 0.1 to 95%, active ingredient of the formula I or combinations of these active ingredients with other insecticides or acaricides, 1 to 99.9% of a solid or liquid additive and 0 to 25%, in particular 0.1 to 20% of a surfactant. While concentrated agents are preferred as a commercial product, the end user generally uses diluted preparations which have substantially lower active substance concentrations.
  • the agents can also contain other additives such as stabilizers, defoamers, viscosity regulators, binders, adhesives and fertilizers or other active ingredients to achieve special effects.
  • the organic extract phase is washed with water, dried over Na 2 S0 4 and concentrated.
  • the residue is purified by distillation.
  • the title compound of the formula is obtained in this way as a colorless liquid with a boiling point of 81-83 ° C / 0.05 Torr.
  • the active ingredient or combination of active ingredients is mixed well with the additives and ground well in a suitable mill.
  • Spray powder is obtained which can be diluted with water to form suspensions of any desired concentration.
  • Emulsions of any desired concentration can be prepared from this concentrate by dilution with water.
  • Ready-to-use stick agents are obtained by mixing the active ingredient or combination of active ingredients with the carrier and grinding them in a suitable mill.
  • the active ingredient or combination of active ingredients is mixed with the additives, ground and moistened with water. This mixture is extruded, granulated and then dried in an air stream.
  • the finely ground active ingredient or combination of active ingredients is evenly applied in a mixer to the kaolin moistened with polyethylene glycol. In this way, dust-free coating granules are obtained.
  • the finely ground active ingredient or combination of active ingredients is intimately mixed with the additives. This gives a suspension concentrate from which suspensions of any desired concentration can be prepared by dilution with water.
  • acetone solution 50 g freshly prepared nutrient substrate for maggots are weighed into beakers. A certain amount of a 1% by weight acetone solution of the active substance in question is pipetted onto the nutrient substrate in the beakers, so that an active substance concentration of 800 ppm results. After mixing the substrate, the acetone is allowed to evaporate for at least 20 hours.
  • the cotton plants are colonized with Spodoptera littoralis or Heliothis virescens lavas in the third larval stage.
  • the test is carried out at 24 ° C and 60% relative humidity. The% mortality of the larvae is determined after 120 hours.
  • An effect of 80-100% shows compound No. 1 according to Example 1 at 0.75 ppm against Spodoptera larvae and Heliothis larvae.
  • Compound No. 3 shows 80-100% activity (mortality) at 12.5 ppm against Spodoptera larvae and at 100 ppm against Heliothis larvae.
  • the egg laying of the beetles is continued, i.e. checked over a period of about 4 weeks.
  • the rating is based on the reduction in the number of eggs laid and hatched from them compared to untreated controls.

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  • Organic Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Plant Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Pest Control & Pesticides (AREA)
  • Agronomy & Crop Science (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
EP85810468A 1984-10-18 1985-10-14 Benzoylphenylharnstoffe Expired - Lifetime EP0179022B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85810468T ATE58131T1 (de) 1984-10-18 1985-10-14 Benzoylphenylharnstoffe.

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
CH499384 1984-10-18
CH4993/84 1984-10-18
CH536184 1984-11-08
CH5361/84 1984-11-08
CH2048/85 1985-05-14
CH204885 1985-05-14
CH3502/85 1985-08-14
CH350285 1985-08-14

Publications (3)

Publication Number Publication Date
EP0179022A2 EP0179022A2 (de) 1986-04-23
EP0179022A3 EP0179022A3 (en) 1987-05-13
EP0179022B1 true EP0179022B1 (de) 1990-11-07

Family

ID=27428360

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85810468A Expired - Lifetime EP0179022B1 (de) 1984-10-18 1985-10-14 Benzoylphenylharnstoffe

Country Status (18)

Country Link
US (3) US4798837A (xx)
EP (1) EP0179022B1 (xx)
JP (1) JPH0347159A (xx)
KR (1) KR900006761B1 (xx)
AU (1) AU586194B2 (xx)
BG (1) BG60408B2 (xx)
BR (1) BR8505181A (xx)
CA (1) CA1242455A (xx)
CY (1) CY1548A (xx)
DE (1) DE3580444D1 (xx)
DK (3) DK160870C (xx)
ES (1) ES8609221A1 (xx)
GB (3) GB2165846B (xx)
IL (1) IL76708A (xx)
LV (1) LV10769B (xx)
MY (2) MY102685A (xx)
NL (1) NL930085I2 (xx)
TR (1) TR22452A (xx)

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MY108591A (en) 1996-10-31
GB8525516D0 (en) 1985-11-20
GB2165846B (en) 1988-08-24
DK266990A (da) 1990-11-07
JPH0347159A (ja) 1991-02-28
US5107017A (en) 1992-04-21
TR22452A (tr) 1987-07-13
LV10769A (lv) 1995-08-20
DK476585D0 (da) 1985-10-17
DK476585A (da) 1986-04-19
BG60408B2 (bg) 1995-02-28
AU4881885A (en) 1986-04-24
DK160870C (da) 1991-10-14
DK164850B (da) 1992-08-31
CY1548A (en) 1991-03-22
DE3580444D1 (en) 1990-12-13
JPH0432057B2 (xx) 1992-05-28
GB8724215D0 (en) 1987-11-18
ES8609221A1 (es) 1986-09-01
CA1242455A (en) 1988-09-27
DK164850C (da) 1993-01-11
DK160870B (da) 1991-04-29
NL930085I2 (nl) 1995-02-16
GB2195635A (en) 1988-04-13
GB2195635B (en) 1988-11-23
ES547951A0 (es) 1986-09-01
BR8505181A (pt) 1986-07-29
IL76708A0 (en) 1986-02-28
AU586194B2 (en) 1989-07-06
DK164854B (da) 1992-08-31
US4980506A (en) 1990-12-25
DK266990D0 (da) 1990-11-07
DK144891A (da) 1991-08-09
US4798837A (en) 1989-01-17
EP0179022A2 (de) 1986-04-23
IL76708A (en) 1990-01-18
DK144891D0 (da) 1991-08-09
EP0179022A3 (en) 1987-05-13
KR860003206A (ko) 1986-05-21
DK164854C (da) 1993-01-11
LV10769B (en) 1996-06-20
GB2195336A (en) 1988-04-07
GB8724216D0 (en) 1987-11-18
MY102685A (en) 1992-09-30
KR900006761B1 (ko) 1990-09-21
GB2195336B (en) 1988-11-09
GB2165846A (en) 1986-04-23

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